Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4854
Number of amino acids:86
Molecular Weight:9910.55 Da
Theoretical pI:8.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.16%
Cysteine CYS (C)910.47%
Glutamic Acid GLU (E)55.81%
Aspartic Acid ASP (D)44.65%
Glycine GLY (G)89.3%
Phynylalanine PHE (F)44.65%
Isoleucine ILE (I)33.49%
Histidine HIS (H)22.33%
Lysine LYS (K)55.81%
Methionine MET (M)44.65%
Leucine LEU (L)55.81%
Asparagine ASN (N)55.81%
Glutamine GLN (Q)33.49%
Proline PRO (P)22.33%
Serine SER (S)55.81%
Arginine ARG (R)910.47%
Threonine THR (T)11.16%
Tryptophan TRP (W)11.16%
Valine VAL (V)89.3%
Tyrosine TYR (Y)22.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC420
HydrogenH673
NitrogenN131
OxygenO121
SulphurS13

FormulaC420H673N131O121S13
Total Number of Atoms:1358


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.906,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.856,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.74, 23.26, 17.44]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:64.4186
Grand average of hydropathicity (GRAVY):-0.36